How To Lock Dissy From Mechanical Advance?

[Evan G]

i have my electronic dissy all apart, (looking down the 4k supercharged path)

 

i understand theres springs that hold the weights, and when the rpm reaches a certain point centrifugal force throws out the weights and BAM advance

 

how did you lock your dissy?

 

i have a idea how to lock it but involes 2 tack welds?

[jono1986]

Hey man, i'm not to sure about tac welding, but for an electronic ignition kit that i've got puts a washer in there to stop the weights from moving

 

 

 

[Evan G]

mate your a legend! gonna make me one these with a aluminum washer tomorrow!

 

thanks again mate

[jason12]

Ive also heard cable ties work? Or was that something else

[Evan G]

dw mate thought of that aswell :blinks: but the temp of the engine bay and rpm, the cable ties wont work

[Taz_Rx]

Cable ties work well on a 3k dizzy, you just put them in the slots where those pins come through in the pics above. I wouldn't use them again in a 4k or elec dizzy though, that's what cause my last blown headgasket. :blinks:

 

Are you making one of those washers for the dizzy I sold you Jono? Not a bad idea but I wouldn't worry too much about it, that dizzy was locked up nice and tight. :lolcry:

[Evan G]

Cable ties work well on a 3k dizzy, you just put them in the slots where those pins come through in the pics above. I wouldn't use them again in a 4k or elec dizzy though, that's what cause my last blown headgasket. :yes:

 

Are you making one of those washers for the dizzy I sold you Jono? Not a bad idea but I wouldn't worry too much about it, that dizzy was locked up nice and tight. :hmm:

 

yea i don't think washers will work. took a couple pics and left my cam at work DOH!

 

bit hard to explain but ill try anyways

 

see on jono's pic how the dowles are on the weights? 5k electric dissy doesnt have em?

 

what other options are there? drill 2 small holes, tap em, use the washer and 2 tiny bolts and a f@$k LOAD of lock tight?

 

i should of ask this at the start why do we need to lock our dissy's when going down the boosted path?

[jono1986]

Cable ties work well on a 3k dizzy, you just put them in the slots where those pins come through in the pics above. I wouldn't use them again in a 4k or elec dizzy though, that's what cause my last blown headgasket. :yes:

 

Are you making one of those washers for the dizzy I sold you Jono? Not a bad idea but I wouldn't worry too much about it, that dizzy was locked up nice and tight. :hmm:

 

Lol nuh man...that was just in the instructions...i was going to fit the ignition system on the weekend but stuffed up the input voltage setting for the coil driver....and after bending the power transistor once then again it broke, so now i need to get another one, i'll post up how it goes soon. Also looking at making my own injection system but have to research a bit first

[Taz_Rx]

Evan:

 

Just remove the springs and replace them with tie-wire..... not cable ties.

 

Welding the weights up isn't a good idea. I did it once and slightly warped the shaft with the heat of welding. That dizzy went straight in the bin.

 

Locking the dizzy reduces the compression ratio 'at the time of firing' by retarding the timing. Re-graphing the mechanical advancement or modifying a boost retard (works opposite to vac advance) solenoid to the dizzy is a better option.

 

Both myself and jono run locked dizzys for other reasons.